How would you know? What is a spiritual baby?
Addressing immature Christians,
the writer of Hebrews says the following…
… we have much to say, and hard to explain, since you have become dull of hearing. For though by this time you ought to be teachers, you need someone to teach you again the first principles of the oracles of God; and you have come to need milk and not solid food. For everyone who partakes only of milk is unskilled in the word of righteousness, for he is a babe. But solid food belongs to those who are of full age, that is, those who by reason of use have their senses exercised to discern both good and evil.” (Hebrews 5:11–14, NKJV)
It’s one thing to be a brand-new Christian and be spiritually shallow. But it’s quite another thing to be a Christian for many years and still be thinking and acting like a new believer. That is what the author of Hebrews is addressing here. There were Christians that have been believers long enough that they should even be “teachers” by now, and yet, they needed to learn their spiritual ABC’s all over again. A newborn baby is a precious thing. But an aged person who is still acting like a newborn or still needs the same nurturing as a newborn is a tragic thing.
May we all continue to grow as students of God’s word and practitioners of the Christian faith.
In view of all this, make every effort to respond to God’s promises. Supplement your faith with a generous provision of moral excellence, and moral excellence with knowledge, and knowledge with self-control, and self-control with patient endurance, and patient endurance with godliness, and godliness with brotherly affection, and brotherly affection with love for everyone. The more you grow like this, the more productive and useful you will be in your knowledge of our Lord Jesus Christ. But those who fail to develop in this way are shortsighted or blind, forgetting that they have been cleansed from their old sins. So, dear brothers and sisters, work hard to prove that you really are among those God has called and chosen. Do these things, and you will never fall away. Then God will give you a grand entrance into the eternal Kingdom of our Lord and Savior Jesus Christ.” (2 Peter 1:5–11, NLT)
Spiritual growth and maturity are your responsibility.